How can I undelete files from the memo pad in my Sony Clie SJ-22?

The battery died on my clie SJ-22, erasing all my info. Is there a way to get it back? Any undelete software for palm operating system?|||You could do a System Restore and I think this will defiantly help it =)|||Try to do a System Restore. Restore it to the day before it went out. That should help.